From a782d5c81f4ad3fc2ad5977ad53a88bb8fb1aad1 Mon Sep 17 00:00:00 2001
From: Derek Mauro <dmauro@google.com>
Date: Tue, 18 Feb 2025 07:14:39 -0800
Subject: [PATCH] Fix feature test for ABSL_HAVE_STD_OPTIONAL

Fixes https://github.com/abseil/abseil-cpp/issues/1840

PiperOrigin-RevId: 728197023
Change-Id: I864164fc64512abac19ee6f9dc4e9562e68489a1
---
 absl/base/config.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/absl/base/config.h b/absl/base/config.h
index 58077a2c58f..76a677de2c1 100644
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -538,7 +538,7 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
 // Checks whether C++17 std::optional is available.
 #ifdef ABSL_HAVE_STD_OPTIONAL
 #error "ABSL_HAVE_STD_OPTIONAL cannot be directly set."
-#elif defined(__cpp_lib_optional) && __cpp_lib_optional >= 202106L
+#elif defined(__cpp_lib_optional) && __cpp_lib_optional >= 201606L
 #define ABSL_HAVE_STD_OPTIONAL 1
 #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
     ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \